Laser vibrating diaphragm F0 tester

The invention relates to a laser vibrating diaphragm F0 tester which comprises a positioning confirming device, a vibration frequency generating device, a real-time distance measuring device and a data processing control device. The positioning confirming device is used for moving a laser displacement sensor to a best measurement position, the vibration frequency generating device is used for pushing measure a measured vibrating diaphragm to vibrate, the real-time distance measuring device is used for measuring vibration amplitudes of the measured vibrating diaphragm at different frequencies, and the data processing control device is used for controlling input and output of changing parameters of the whole system, forming a curve chart of the vibration amplitudes of the measured vibrating diaphragm and further calculating the resonant frequency. The positioning confirming device comprises three guide rails perpendicular with one another in a space and a three-shaft closed ring control console, wherein one ser